Lathe.



Patented April 18, 1905.

PATENT' OFFICE.

JOSEPH .IGHN PEALING, OFVLIVERPOOL, ENGLAND.

LATHE.

SPECIFICATION forming part of' Letters Patent No. 787,690, dated April 18, 1905.

Application filed December 10, 1903. Serial No. 184,528.

To all whom, it #my concern:

Be it known that I, J osEPH JOHN PEALING,

engineer, a subject of the King of Great Britain, and a resident of Liverpool, in the county of Lancaster, England, (whose post-office address is 11 Earle road, Liverpool, aforesaid,-) have invented certain new and useful Improvements in or Relating to Lathes, (for which application has been made in Great Britain, No. 27 ,419, dated December l2, 1902,) of which the following is a specification.

This invention relates to lathes.

Itis found in certain classes of lathes, especially such as are used for making tools, gages, dies, jigs, and the like, that the usefulness of the fool for such work is considerably diminished because of the necessity for transferring the work to a milling-machine or a wheel cutting-machine for certain operations. The work done in such lathes is of so speciala character that it must be done in each stage by the one workman, and the object of my invention is to so modify the construction of a lathe in which the bulk of such work is now done that in addition to its usual purposes it may be used to readily perform the operations of milling, drilling, and dividing, so that the class of work referred to maybe done by the one workman on one machine, with which he is necessarily familiar.

I have illustrated my invention in the accompanying drawings, in which- Figure I is a side elevation of the end of a lathe fitted with adjustable head-stock. Fig. II is an end view in elevation. Fig. III is a sectional plan on the line A A of Fig. I; and Fig. IV is an inverted plan view of the top plate of the head-stock, taken looking upward from line A A of Fig. I. Fig. V is a section on the line B B of Fig. IV.

The lathe-bed is provided at the head end with two vertical slide-beds 1, preferably recessed, as shown in dotted lines in Figs. I and III, both ends of which slide-beds may be undercut or only one end, as shown, the other end in such latter case being provided with cheek-pieces 2, packing-strips 2', and tightening-screws 2, the front cheek-piece being preferably made integral with the leading- Screw bracket. In the slide-beds so formed extension-pieces 3, integral with the main head-stock, are very accurately fitted, so as to slide therein without shake. Slots 4 are c-ut in the extension-pieces 3, through which and the slide-beds is passed a clamping-bolt 5, provided with a knurled hand-nut 6, by means of which the head-stock may be locked in any desired position.

The mechanism for raising and lowering the head-stock is as follows: The bevel-wheel 8, Fig. III, is integral with the spindle 7, which is mounted in the bush 9, screwed into a lug on the lathe-bed 1. On turning the spindle 7 by means of ka key iitting the squared end thebevel-wheels 8 and 10 are rotated, and as the latter wheel is collared to a cross-piece 39 of the bed 1, so that it may only partake of a rotatory movement, it acts as a fixed nut for the spindle 11. The spindle 11 is screwed at 12 into the head-stock and is also threaded at its lower end, where it passes through the journal of the wheel 10, so that on the rotation of the latter the spindle 11 and the headstock to which it is attached is raised or lowered. A graduated index-plate 13, adjustable by the nipping-screw 14,.may be provided on the spindle 7, and a Vernier-scale 15 is also fitted to the extension-piece 3 and the lathebed. By these means the lathe-mandrel 16 may be accurately fixed at varying distances from the surface of the lathe-bed 17, and so permit of different operations being performed onv the work.

In order to maintainthenecessary tightness of belt and yet permit of the movement of the head-stock, means indicated in Figs. I and II are employed or may be employed; but as this belt-tightening feature is embodied in another pending application and is not claimed herein it will suiice to say here that 18 and 19 are guide-pulleys disposed at opposite sides of the running-off part of the belt. The pulleys are carried in a forked rocking lever 21, mounted on a locking-spindle having at its middle part a right and left helical spring 23, cut from tubing. The ends of this spring connect with the respective levers 21. This spindle is carried in brackets 25, pivoted on the frame and provided with locking-quadrants 26. There is a locking-lever 27 and locking- ICO wheels 28 and 29 on the locking-spindle, and the teeth of these wheels may be put into or out of engagement with detent-pieces 30 on the brackets 25. By means of a key engaging the square 31 on the end of the lockingspindle the latter may be turned for tightening the belt.

The top plate of the head-stock on its lower side is provided with a recess 35 or cut away so as to leave only three bearing-surfaces 40, 41, and 42 of as small an area as is practicable, as shown in Figs. IV and Vso that any metal chippings Which may find their way underneath will not prevent the head-stock from sitting hard down on the lathe-bed, while a guard 37 is provided in the recess of the lathe-bed to lead away and to as far as possible prevent filings and chips from getting under the head-stock or into its mechanism. Two holes 37 are provided in this guard, so as to receive, if desired, a further vertical guard for use when the head-stock is raised. Holes 38 are drilled in the end of the lathebed to allow of the holes in the cross-piece 39 being bored to receive the nuts holding the bearing-piece 36 in position.

The lathe mandrel carries the necessary standard tools for milling, drilling, dividing, &c., and the main saddle, the cross-slide, and the small traversing-slide, which is adapted to angle, are all mounted and operated in the usual manner, and a milling table or vise is provided, which may take the place ofthe toolslide, which is removable.

The numeral 43 designates the usual horizontal shaft for traversing the tool-holder.

In order to compensate for any slackness of the belt when the head-stock isvraised from the lathe-bed, any suitable belt-tightening device may be employed. That shown in Figs. I and II is preferred. It is embodied in my copending application, Serial No. 216, 552,`1led on July 14, 1904, as a division of this present application.

I declare that what I claim is- 1. A lathe with a head-stockadjustable as to height comprising a lathe-bed; two vertical extension-pieces on said head-stock adapt- Y ed to slide on said lathe-bed; guides on said lathe-bed adapted to guide said extensionpieces; screw means for raising and lowering said head -stocl{; means for clamping said head-stock in position, substantially as described and set forth.

2. In a lathe with a head-stock adjustable as to height; a lathe-bed; a head-stock comprising the usual live-spindle, two downwardly-projecting extension-pieces adapted to slide and be clamped on the lathe-bed and means for raising and lowering said headstock substantially as described.

In .witness whereof I have hereunto signed my name, this 28th day of November, 1903, in the presence of two subscribing witnesses. JOSEPH JOHN PEALING. Witnesses:

HUBERT PUMPHREY, ALFRED MoDoNALD. 

